Add documentation about missing support for `Fuse` category

[tiyash-basu-frequenz]

What's needed?

The Fuse component category is not going to be used in code, for now. The reasons are:

• if a fuse is placed before one and only one component, then we already handle it at the component.
• if a fuse is placed before multiple component, and if we can control these components, then we handle it by limiting each component individually.

The only case that is left un-handled is the following - if a fuse is placed before multiple components, and if we can control only a few of these components. So far we have not seen any instance of such fuses besides in GridConnectionPoint (which already has a fuse limit).

Therefore, we will defer implementing support for fuses until the need arises. For now, we need to leave the Fuse component category in, and document it appropriately.

Proposed solution

No response

Use cases

No response

Alternatives and workarounds

No response

Additional context

No response